We will need more info especially temps.
I have a brick of their hazy yeast which i assume is what you are referring to? I have not yet used it.
I have used the Munich lager, Voss, and San Diego(chico).
The Voss worked as expected.
The Munich Lager was a little slow to take off, but it finished clean and down to about 78% attenuation. Which is not terrible for the beer style.
The San Diego is currently bubbling away in a sour. It has been very slow fermentation wise, but it was pitched into beer that had llalemand sour pitch already rolling. The PH was 3.4 when i pitched the yeast and 12.8P on Friday afternoon. This morning the ph was down to 3.19 and the grav was 9.1p. This is a HARSH environment to say the yeast! Even Voss struggles to get started in the sours. The Lactic bacteria has eaten most of the Small sugars and it didnt get its normal O2 kick while knocking out.
This does not surprise me at all, but i was hoping that being solidly within the temp range of the Chico yeast would give it a leg up over the Voss. Its going slow but i don't think that is the fault of the yeast.